In reply to Gazlynn:
> If your close to a decathlon go for the wedze ultralight down jacket.
Seconded. My M weighs 250g, and packs down small; stuffed into the bottom of my small MTB pack for skiing this year (leaving room for usual goggles, camera, etc).
Not as well stuffed as something like a Rab Microlight Alpine, and face fabric not as robust. But about 1/4 the price... (well, 1/3 now that the Alpine is available for about £125)
Oh, the Wed'ze might now be discounted to £35:
http://www.decathlon.co.uk/warm-ultralight-down-ski-jkt-id_8283695.html
Hmm... women only, it seems. Men's is still £50